CN209587055U - A kind of fixed shaft type speed reducer and down-the-hole drill - Google Patents
A kind of fixed shaft type speed reducer and down-the-hole drill Download PDFInfo
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- CN209587055U CN209587055U CN201920257239.5U CN201920257239U CN209587055U CN 209587055 U CN209587055 U CN 209587055U CN 201920257239 U CN201920257239 U CN 201920257239U CN 209587055 U CN209587055 U CN 209587055U
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Abstract
The utility model relates to reducer technology field, a kind of fixed shaft type speed reducer and down-the-hole drill are specifically disclosed, which includes: shell, is internally provided with accommodating cavity；Gear shaft is pivotally connected with shell；Driving gear and driven gear are pivotally connected with shell and are respectively positioned in accommodating cavity, and driving gear is engaged with driven gear, and driving gear is installed on gear shaft；Output shaft is pivotally connected with shell, and driven gear fixing sleeve is set to output shaft, and output shaft is equipped with the first through hole through its both ends, and the first end of output shaft passes through shell and for connecting with hollow drill, and the second end of output shaft with high-pressure air source for connecting；Oil sealing and dustband are embedded at shell and cooperate with output sealing, and dustband is with respect to oil sealing close to the first end of output shaft, to in use, dirt sand is obstructed by dustband, oil sealing on rear side of dustband will not be damaged, can guarantee the service life of oil sealing, prevent oil leak.Down-the-hole drill includes above-mentioned fixed shaft type speed reducer.
Description
Technical field
The utility model relates to reducer technology field more particularly to a kind of fixed shaft type speed reducers and down-the-hole drill.
Background technique
Currently, one kind is planetary for driving the structure of the speed reducer of drilling rod that can be divided into two kinds on the down-the-hole drill of mine
Speed reducer, one kind are fixed shaft type speed reducer.The advantages of planetary speed reducer is that compact-sized, bearing capacity is big；The disadvantage is that structure phase
To complexity, components required precision is high, difficulty of processing is big, and comprehensive manufacturing cost is high and inconvenience is safeguarded, is currently used primarily in
High-power type.Fixed shaft type speed reducer advantage is that structure is simple, and manufacturing process requires and manufacturing cost is lower and convenient for safeguarding；It lacks
In the case that point is similar sizes parameter, low bearing capacity is currently used primarily in small-power type in planetary structure.
In the related technology, the down-the-hole drill equipped with fixed shaft type speed reducer, working environment are all sand and dust than more serious, sand and dust
Environment causes to seriously affect to the sealing performance of rotating seal, to cause speed reducer seal failure, oil leakage fault occurs, because
This seriously affects the service life of the components of speed reducer.In addition, the bearing capacity of fixed shaft type speed reducer in the related technology
Depend primarily on the intensity of the intensity of gear, especially driver pinion.What is generallyd use at present is standard spur gear transmission, is
Meet large speed ratio requirement, all very close standard spur gear minimum of the number of teeth of driver pinion requires the number of teeth (17 tooth), in this way
Standard pinion gear teeth bending strength it is lower, and in process, easily appearance " cutting root " phenomenon further weakens tooth root
Intensity further decreases the bearing capacity of gear.Furthermore to guarantee drilling rod running accuracy, between fixed shaft type speed reducer and drilling rod
The impact for being generally equipped with complicated damper to reduce drilling rod to speed reducer, slow down the abrasion of output shaft spring bearing with
The rotational positioning precision for keeping drilling rod, as speed reducer is increased using the time, the abrasion of output shaft spring bearing is also being stepped up,
The running accuracy in turn resulting in drill bit declines rapidly, leads to the decline of overall operation precision.
Utility model content
The purpose of this utility model is that: a kind of fixed shaft type speed reducer and down-the-hole drill are provided, to solve in the related technology
When fixed shaft type speed reducer works under the more serious environment of sand and dust, rotating seal is easy to be influenced by sand and dust, causes to slow down
Machine seal failure, the problem of causing oil leakage fault to occur.
On the one hand, the utility model provides a kind of fixed shaft type speed reducer, which includes:
Shell is internally provided with accommodating cavity；
Gear shaft is pivotally connected with the shell；
Driving gear and driven gear are pivotally connected and are respectively positioned in the accommodating cavity, the driving gear with the shell
It is engaged with the driven gear, the driving gear is installed on the gear shaft；
Output shaft is pivotally connected with the shell, and the driven gear fixing sleeve is set to the output shaft, is set on the output shaft
There is the first through hole through its both ends, the first end of the output shaft is located at outside the shell and for connecting with hollow drill,
The second end of the output shaft with high-pressure air source for connecting；
Oil sealing and dustband are embedded at the shell and cooperate with the output sealing, and the dustband is opposite
The oil sealing is close to the first end.
Preferably, first bearing and second bearing are arranged on the gear shaft, the first bearing and described second
Bearing is located at the two sides of the driving gear, and the outer ring of the outer ring of the first bearing and the second bearing is both secured to described
Shell.
Preferably, the first bearing is deep groove ball bearing, the second bearing is self-aligning bearing.
Preferably, the fixed shaft type speed reducer further includes being respectively positioned in the accommodating cavity and being set in the output shaft
On 3rd bearing and fourth bearing, the 3rd bearing and the fourth bearing are relatively arranged on the two of the driven gear
The outer ring of side, the outer ring of the 3rd bearing and the fourth bearing is both secured to the shell.
Preferably, the 3rd bearing and the fourth bearing are tapered roller bearing.
Preferably, the fixed shaft type speed reducer further includes being located in the accommodating cavity and being set on the output shaft
Radial locating element, first end of the relatively described driven gear of the radial locating element close to the output shaft, the radial positioning
The outer surface of part is abutted with the shell.
Preferably, the fixed shaft type speed reducer further includes the attachment base being sealingly mounted on the shell, the connection
Seat is equipped with the second through-hole through its both ends, one end of second through-hole and the output sealing grafting, and described second
The other end of through-hole with high-pressure air pipe for connecting.
Preferably, the fixed shaft type speed reducer further includes gas seal ring, the gas seal ring sealing shroud is set to institute
The second end of output shaft is stated, the gas seal ring is embedded at the attachment base.
Preferably, the pressure angle of the driving gear and the driven gear is 25 °.
On the other hand, the utility model provides a kind of down-the-hole drill, including the fixed shaft type speed reducer in any of the above-described scheme.
The utility model has the following beneficial effects:
The utility model provides a kind of fixed shaft type speed reducer, and oil sealing and dustband are embedded at shell and and output shaft
Sealing cooperation, dustband with respect to oil sealing close to the first end of output shaft, thus, when in actual use, dustband is direct
The dirt generated in face of operation is husky, and dirt sand is obstructed by dustband, will not damage, can effectively protect to the oil sealing on rear side of dustband
The service life of oil sealing is demonstrate,proved, and then guarantees the sealing effect of speed reducer, prevents oil leakage fault.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of fixed shaft type speed reducer in the utility model embodiment.
In figure:
1, procapsid；2, back casing；3, output shaft locating axle seat；4, gear shaft；5, driving gear；6, driven gear；7,
Output shaft；8, oil sealing；9, dustband；10, first bearing；11, second bearing；12,3rd bearing；13, fourth bearing；14, diameter
To locating piece；15, attachment base；16, gas seal ring.
Specific embodiment
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, the present embodiment provides a kind of fixed shaft type speed reducer, including shell, gear shaft 4, driving gear 5, from
Moving gear 6, output shaft 7, oil sealing 8 and dustband 9.Wherein, enclosure interior is equipped with accommodating cavity, and driving gear 5 and driven gear 6 are equal
In the accommodating cavity, and driving gear 5 and driven gear 6 engage.Gear shaft 4 and output shaft 7 are articulated in shell, main
The fixation of moving gear 5 is set on gear shaft 4, and the fixation of driven gear 6 is set on output shaft 7.In the present embodiment, gear shaft 4
One end is equipped with spline, and for spline for connecting with Movers such as motors, spline can be internal spline, external splines or spline housing.
The first end of output shaft 7 is located at outside accommodating cavity, and second end is located in accommodating cavity, and output shaft 7 is equipped with first through its both ends
Through-hole, the first end of output shaft 7 specifically, can be connected through a screw thread, the second end of output shaft 7 for connecting with hollow drill
For connecting with high-pressure air source, high pressure gas can reach the drill bit of drilling rod end side by side by output shaft 7 and hollow drill
Out, high pressure gas can by drill bit broken delay residue and dust remove, and can also play to brick cooling effect
Fruit improves the reliability and service life of drilling work.Oil sealing 8 and dustband 9 are embedded at shell and seal with output shaft 7
Cooperation, dustband 9 with respect to oil sealing 8 close to the first end of output shaft 7, thus, when in actual use, dustband 9 is direct
The dirt generated in face of operation is husky, and dirt sand is obstructed by dustband 9, will not damage to the oil sealing 8 of 9 rear side of dustband, Neng Gouyou
Effect guarantees the service life of oil sealing 8, and then guarantees the sealing effect of speed reducer, prevents oil leakage fault.
It is understood that the radius of driving wheel is less than the diameter of driven wheel, so as to play slowing effect.
Output shaft 7 can be connect with driven gear 6 by singly-bound, double bond connection, multikey connects or spline connection, may be used also
It is carried out in a manner of using interference connection etc. affixed.
Shell includes procapsid 1, back casing 2 and output shaft locating axle seat 3, and procapsid 1 and back casing 2 are bolted
And seal washer is equipped between procapsid 1 and back casing 2, back casing 2 and output shaft locating axle seat 3 be bolted and
Sealing ring is again provided between back casing 2 and output shaft locating axle seat 3.Accommodating cavity is by back casing 2 and output shaft locating axle seat 3
Common enclose sets.The first end of output shaft 7 sequentially passes through output back casing 2 and output shaft locating axle seat 3 and is located at accommodating cavity
It is external.Oil sealing 8 is embedded on the inner sidewall of output shaft locating axle seat 3, and dustband 9 is equally embedded on output shaft locating axle seat 3,
And dustband 9 is located between the inner sidewall and lateral wall of output shaft locating axle seat 3.
The pressure angle of driving gear 5 and driven gear 6 is 25 °, and driving gear 5 and driven gear 6 are all made of big tooth form
Angle, and pinion gear is designed using normal shift, had both been avoided that in the processing of driving gear 5 in this way and has occurred cutting root problem and reducing tooth root
Intensity, and face direct stress and work shear stress can be reduced, and increase the section modulus of tooth root weak section, it can effectively mention
High contact strength between gear and tooth face and teeth bending strength increase the bearing capacity of gear, can match more high-power type.Gear is cut
It, can be machined out by root if the addendum line of cutter has been more than limit of contact point when root is referred to through generating method gear
Involute cut a part, this phenomenon is known as cutting root.
First bearing 10 and second bearing 11 are arranged on gear shaft 4, first bearing 10 and second bearing 11 are located at actively
The two sides of gear 5, the outer ring of first bearing 10 and the outer ring of second bearing 11 are both secured to shell, can pass through 10 He of first bearing
Second bearing 11 is supported gear shaft 4.In the present embodiment, first bearing 10 is deep groove ball bearing, and second bearing 11 is to adjust
Mandrel is held.In other embodiments, first bearing 10 and second bearing 11 can also be respectively deep groove ball bearing and taper roller
One in bearing.
3rd bearing 12 and fourth bearing 13 are arranged on output shaft 7,3rd bearing 12 and fourth bearing 13 are oppositely arranged
In the two sides of driven gear 6, the outer ring of 3rd bearing 12 and the outer ring of fourth bearing 13 are both secured to shell.Pass through 3rd bearing
12 and fourth bearing 13 output shaft 7 is supported, in the present embodiment, 3rd bearing 12 and fourth bearing 13 are taper roller
Bearing.Preferably, fixed shaft type speed reducer further includes the radial locating element 14 in accommodating cavity and being set on output shaft 7, diameter
To locating piece 14 with respect to driven gear 6 close to the first end of output shaft 7, the outer surface of radial locating element 14 is abutted with shell.This
In embodiment, radial locating element 14 is bearing, and the inner ring of bearing is set on output shaft 7, and the outer ring of bearing is fixed on the shell.
Specifically, the outer ring of bearing is fixed on output shaft locating axle seat 3.In other embodiments, radial locating element 14 may be
Oiliness bearing, positioning ring or positioning sleeve etc..Cooperate 3rd bearing 12 and 13 pairs of fourth bearing outputs by radial locating element 14
Axis 7 carries out auxiliary radial positioning, since 3rd bearing 12 and fourth bearing 13 can axially and radially locate driven wheel, diameter
To locating piece 14 substantially not by axial force, because can effectively solve in the related technology because of taper roller without carrying out axially position
Bearing wear and the problem of decline drilling rod running accuracy, and compared with the prior art without damper, effectively reduce
The manufacturing cost of complete product.
Fixed shaft type speed reducer further includes attachment base 15, and attachment base 15 is connected with housing seal, and specifically, attachment base 15 is with before
It is equipped with sealing ring between shell 1, is connected attachment base 15 and procapsid 1 by bolt.Attachment base 15, which is equipped with, runs through its both ends
The second through-hole, one end of the second through-hole and output shaft 7 seal grafting, and the other end of the second through-hole, which is equipped with, to be used for and high-pressure air pipe
The internal screw thread of connection.Specifically, fixed shaft type speed reducer further includes gas seal ring 16, and 16 sealing shroud of gas seal ring is set to output
The second end of axis 7, gas seal ring 16 are embedded at attachment base 15.Preferably, gas seal ring 16 is equipped with twice, and along output shaft
7 axially spaced-apart distribution, can effectively prevent high pressure gas to reveal.
The present embodiment also provides a kind of down-the-hole drill, including above-mentioned fixed shaft type speed reducer.
Obviously, the above embodiments of the present invention is used for the purpose of clearly illustrating examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model claims.
Claims (10)
1. a kind of fixed shaft type speed reducer characterized by comprising
Shell is internally provided with accommodating cavity；
Gear shaft (4) is pivotally connected with the shell；
Driving gear (5) and driven gear (6) are pivotally connected and are respectively positioned in the accommodating cavity, the driving tooth with the shell
Wheel (5) is engaged with the driven gear (6), and the driving gear (5) is installed on the gear shaft (4)；
Output shaft (7) is pivotally connected with the shell, and driven gear (6) fixing sleeve is set to the output shaft (7), the output
Axis (7) is equipped with the first through hole through its both ends, and it is outer and be used for and sky that the first end of the output shaft (7) is located at the shell
The connection of heart drilling rod, the second end of the output shaft (7) with high-pressure air source for connecting；
Oil sealing (8) and dustband (9) are embedded at the shell and seal cooperation, the dustband with the output shaft (7)
(9) the relatively described oil sealing (8) is close to the first end.
2. a kind of fixed shaft type speed reducer according to claim 1, which is characterized in that be arranged on the gear shaft (4)
One bearing (10) and second bearing (11), the first bearing (10) and the second bearing (11) are located at the driving gear
(5) two sides, the outer ring of the first bearing (10) and the outer ring of the second bearing (11) are both secured to the shell.
3. a kind of fixed shaft type speed reducer according to claim 2, which is characterized in that the first bearing (10) is deep-groove ball
Bearing, the second bearing (11) are self-aligning bearing.
4. a kind of fixed shaft type speed reducer according to claim 1, which is characterized in that the fixed shaft type speed reducer further includes equal
The 3rd bearing (12) and fourth bearing (13) in the accommodating cavity and being set on the output shaft (7), described
Three bearings (12) and the fourth bearing (13) are relatively arranged on the two sides of the driven gear (6), the 3rd bearing (12)
Outer ring and the outer ring of the fourth bearing (13) be both secured to the shell.
5. a kind of fixed shaft type speed reducer according to claim 4, which is characterized in that the 3rd bearing (12) and described
Four bearings (13) are tapered roller bearing.
6. a kind of fixed shaft type speed reducer according to claim 4, which is characterized in that the fixed shaft type speed reducer further includes position
In in the accommodating cavity and the radial locating element (14) that is set on the output shaft (7), the radial locating element (14) are opposite
First end of the driven gear (6) close to the output shaft (7), outer surface and the shell of the radial locating element (14)
It abuts.
7. a kind of fixed shaft type speed reducer according to claim 1, which is characterized in that the fixed shaft type speed reducer further includes close
The attachment base (15) of envelope installation on the housing, the attachment base (15) is equipped with the second through-hole through its both ends, described
One end of second through-hole and the output shaft (7) seal grafting, and the other end of second through-hole with high-pressure air pipe for connecting.
8. a kind of fixed shaft type speed reducer according to claim 7, which is characterized in that the fixed shaft type speed reducer further includes gas
Body sealing ring (16), gas seal ring (16) sealing shroud are set to the second end of the output shaft (7), the gas seal ring
(16) attachment base (15) are embedded at.
9. a kind of fixed shaft type speed reducer according to claim 1, which is characterized in that the driving gear (5) and it is described from
The pressure angle of moving gear (6) is 25 °.
10. a kind of down-the-hole drill, which is characterized in that subtract including hollow drill and the described in any item fixed shaft types of claim 1-9
Fast machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920257239.5U CN209587055U (en) | 2019-02-28 | 2019-02-28 | A kind of fixed shaft type speed reducer and down-the-hole drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920257239.5U CN209587055U (en) | 2019-02-28 | 2019-02-28 | A kind of fixed shaft type speed reducer and down-the-hole drill |
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| Publication Number | Publication Date |
|---|---|
| CN209587055U true CN209587055U (en) | 2019-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920257239.5U Active CN209587055U (en) | 2019-02-28 | 2019-02-28 | A kind of fixed shaft type speed reducer and down-the-hole drill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818802A (en) * | 2021-09-17 | 2021-12-21 | 贵州航天天马机电科技有限公司 | Driving device for open-air down-the-hole drill |
-
2019
- 2019-02-28 CN CN201920257239.5U patent/CN209587055U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818802A (en) * | 2021-09-17 | 2021-12-21 | 贵州航天天马机电科技有限公司 | Driving device for open-air down-the-hole drill |
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